The activities of several commercial PCB mixtures as inducers of microsomal aryl hydroarbon hydroxylase (AHH) and ethoxyresorufin 0-deethylase (EROD) in male Wistar rats and rat hepatoma cells were dependent on the chlorine content (and congener distribution) of the mixtures. The was a correlation between the in vivo and in vitro induction potencies of these mixtures; the most active mixtures, Aroclors 1242, 1248 and 1254 contained 42-54% by weight of Cl whereas formulations with higher or lower (Aroclors 1221 and 1268 respectively) chlorine content exhibited lower activities. This corresponds with studies reported for PCB isomers and congeners in which the most active compounds are tetra-hexachlorobiphenyls.
ASJC Scopus subject areas
- Environmental Engineering
- Environmental Chemistry
- Health, Toxicology and Mutagenesis